<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>边框 阴影</title>
    <style>
        .item .title {
            border-bottom: 1px solid #cccccc;
        }

        .item .content {
            display: flex;
            align-items: center;
            padding: 10px;
        }

        .box {
            width: 100px;
            height: 100px;
        }

        .item:nth-child(1) .box{
            box-shadow: 0 0 20px #ccc;
        }
    </style>
</head>
<body>
<div class="item">
    <div class="title">
        <h1>box-shadow 外阴影</h1>
    </div>
    <div class="content">
        <div class="box"></div>
    </div>
</div>

<div class="item">
    <div class="title">
        <h1>box-shadow 内阴影</h1>
    </div>
    <div class="content">
        <div class="box"></div>
    </div>
</div>
</body>
</html>